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Subclass AMPHIDISCOPHORA Schulze, 1886

Diagnosis

Lophophytous Hexactinellida which always contain amphidisc microsleres or some variant of them, and triaxon microscleres which never bear terminal ray branching (never astral microscleres); choanosomal skeleton of loose megascleres, never fused together, in the form of hexactins, pentactins, stauractins, tauactins, diactins or some combination of these; hypodermalia usually as pentactins, rarely hexactins and stauractins.

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
29-Mar-2018 28-Feb-2012 MODIFIED
29-Mar-2018 15-Apr-2011 MODIFIED
12-Feb-2010 (import)